<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>React</title>
    <script src="../build/react.js"></script>
    <script src="../build/react-dom.js"></script>
    <script src="../build/browser.min.js"></script>
  </head>
  <body>
    <div id="example"></div>
    <script type="text/babel">
      let Hello=React.createClass({
        getInitialState:function(){
          return {
            opacity: 1.0
          };
        },
        componentDidMount: function(){
          this.timer=setInterval(function(){
            let opacity=this.state.opacity;
            opacity -= .05;
            if(opacity<0.1){
              opacity=1.0;
            }
            this.setState({
              opacity: opacity
            });
          }.bind(this),100)
        },

        render:function(){
          return (
            <div style={{opacity: this.state.opacity}}>
              Hello {this.props.name}
            </div>
          );
        }
      });

      ReactDOM.render(
        <Hello name="world"></Hello>,
        document.body
      );
    </script>
  </body>
</html>
